Welcome to Kratt Lumber

Kratt Lumber Company was founded at a time when there were about a dozen other full-service lumberyards in town. Those other yards have disappeared over the years, but Kratt Lumber has survived and is now in the hands of a third-generation owner, Michael Kratt.

  • The Infinity Difference
  • Our Products
  • Hassle-Free Experience

The Infinity Difference

Infinity® replacement windows and doors are made from Ultrex fiberglass material so strong and durable it is superior to other window materials. Best of all, it makes Infinity products virtually maintenance free.

Advantages of Ultrex® Fiberglass

Strong, stable, durable and virtually indestructible, Ultrex is possibly the perfect material, creating windows and doors that leave other materials in the dust.

  • Patented mechanically bonded acrylic cap, virtually indestructible surface.
  • 8x stronger than vinyl, 3.5x stronger than wood.
  • 500x less thermal conductivity than aluminum.
  • Low thermal expansion (essentially the same as glass) for better seals, longer life.
  • Strength allows for narrow better looking profiles and more visible glass area.
Schedule your FREE in-home consultation from a local expert today!
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Kratt Lumber Co.
1714 S 16th St
Lacrosse, WI 54601
© 2015 Marvin Windows and Doors